Finding the Fourth Proportional to 11,857.87, 17,795.57 and 5,617.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,857.87 : 17,795.57 = 5,617.89 : x
2. Step 2: Convert to fraction form
   11,857.87/17,795.57 = 5,617.89/x
3. Step 3: Cross multiply
   11,857.87x = 17,795.57 × 5,617.89
4. Step 4: Simplify right side
   11,857.87x = 99,973,568.79
5. Step 5: Solve for x
   x = 99,973,568.79/11,857.87
6. Step 6: Final answer
   x = 8,430.99